Noctua NF-A14 industrialPPC-2000 Fan (140x140x25mm 3-pin, 2000rpm, IP52) Award-winning NF-A14 design 2000rpm industrialPPC version Three-phase motor design, Class-leading energy efficiency, Fibre-glass reinforced polyamide construction Certified IP52 water- and dust protection, Flow Acceleration Channels, Inner Surface Microstructures